Add release notes for 0.25.0

Change-Id: I88ee7947d34512276ac5866bf1ada0666f2eaac9

releasenotes/notes/multi-store-0c004fc8aba2a25d.yaml

@@ -0,0 +1,16 @@
+---
+prelude: >
+    This release contains the base work for multiple back-ends changing how
+    the back-ends get configured. Please note that in Rocky release the work
+    is still experimental. Thus it's not advised to utilize the new configs in
+    production environments before Stein release even though old config options
+    are deprecated for removal.
+features:
+  - |
+    EXPERIMENTAL: Multiple back-end stores
+deprecations:
+  - |
+    'stores' and 'default_store' config options have been deprecated for
+    removal. As the replacements are experimental for Rocky release, migration
+    away from these options in production environments is not advised before
+    Stein release.

releasenotes/notes/rocky-bugfixes-adefa8f47db16a2d.yaml

@@ -0,0 +1,10 @@
+---
+fixes:
+  - |
+    * Bug 1606268_: Failure to upload to swift when keystone uses "insecure" SSL
+    * Bug 1779455_: cinder backend causes BadRequest due to NULL mountpoint
+    * Bug 1764200_: Glance Cinder backed images & multiple regions
+
+    .. _1606268: https://bugs.launchpad.net/glance-store/+bug/1606268
+    .. _1779455: https://bugs.launchpad.net/glance-store/+bug/1779455
+    .. _1764200: https://bugs.launchpad.net/glance-store/+bug/1764200